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Issue ID




Terrain detail meshes do not receive the correct lighting when using Light Layers in 2021.2



How to reproduce:
1. Open the user attached "HDRP 12.1 Grass" project
2. Open the "BugGrass" Scene found in the "BugGrass" folder

Expected result: Objects used as details on the Terrain GameObject receive proper lighting
Actual result: Details on the Terrain do not receive proper lighting

Reproducible with: 12.0.0 (2021.2.0b15), 12.1.2 (2021.2.7f1), 12.1.3 (2021.2.8f1)
Not reproducible with: 12.0.0 (2022.1.0a10), 13.0.0 (2022.1.0a12), 13.1.4 (2022.1.0b3)
Couldn't test with: 7.7.1 (2019.4.34f1), 10.8.1 (2020.3.26f1), 11.0.0 (2021.1.28f1) - HDRP does not support Detail shaders on those versions

- The issue seems to be caused by the Light Layers setting, turning it off fixes the issue
- The Light Layers setting can be turned off in the "DefaultHDRPAsset.asset" file
- Some versions of HDRP are very specific to the Unity Editor version, preventing consistent testing
- Reproducible on a new project in 2021.2
- Not reproducible with URP
- On a new project Light Layers setting can be found in "HDRP High Fidelity.asset" in the "Settings" folder

  1. Resolution Note:

    This issue seems to have been fixed in 2022.1, so it would be preferred for user to upgrade to this version for the fix, so that the HDRP team can focus their efforts fixing existing issues.

Comments (1)

  1. benjmitch

    May 12, 2022 12:11

    I've been tracking this issue since it affects my URP project, waiting for 2022.1 to become tech stream, which it now has. I've tried the upgrade, and the problem remains. I wonder if someone with access to the test project can check whether 2022.1.0f1 still has this issue in HDRP? If it's fixed in HDRP, it may not be fixed in URP - I can put together a test case if so.

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